Ethanol production from mixtures of sugarcane bagasse and Dioscorea composita extracted residue with high solid loading

Ye, Guangying; Zeng, Defu; Zhang, Shuaishuai; Fan, Meishan; Zhang, Hongdan; Xie, Jun

doi:10.1016/j.biortech.2018.02.008

Cited by 44 publications

(19 citation statements)

References 41 publications

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“…Increasing solid loading is more favorable because of its potential to achieve a higher product titer. Ye et al found that ethanol was 82.8 g/L at high solid loading of 34.0% from mixtures of sugarcane bagasse and Dioscorea composita extracted residue using SSF process [36]. To demonstrate the effectiveness of PreSSLP process and improve lipid titer, we performed more experiments with 5.0 mg/g cellulase and solid loading up to 20.0%.…”

Section: Lipid Production With Higher Solid Loadingsmentioning

confidence: 99%

Microbial Lipid Production from Corn Stover by the Oleaginous Yeast Rhodosporidium toruloides Using the PreSSLP Process

Dai

Shen

et al. 2019

Energies

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Dry acid pretreatment and biodetoxification (DryPB) has been considered as an advanced technology to treat lignocellulosic materials for improved downstream bioconversion. In this study, the lipid production from DryPB corn stover was investigated by the oleaginous yeast Rhodosporidium toruloides using a new process designated prehydrolysis followed by simultaneous saccharification and lipid production (PreSSLP). The results found that prehydrolysis at 50 °C and then lipid production at 30 °C improved lipid yield by more than 17.0% compared with those without a prehydrolysis step. The highest lipid yield of 0.080 g/g DryPB corn stover was achieved at a solid loading of 12.5%. The fatty acid distribution of lipid products was similar to those of conventional vegetable oils that are used for biodiesel production. Our results suggested that the integration of DryPB process and PreSSLP process can be explored as an improved technology for microbial lipid production from lignocellulosic materials.

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Section: Lipid Production With Higher Solid Loadingsmentioning

confidence: 99%

Microbial Lipid Production from Corn Stover by the Oleaginous Yeast Rhodosporidium toruloides Using the PreSSLP Process

Dai

Shen

et al. 2019

Energies

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“…Aiming at increasing ethanol yields, the mix of first and second generation sources, such as sweet sorghum with its stalks or corn cobs with tea seed cake [49,50], has been proposed. Other variations to the SSF method have included pre-saccharification, fed batch, and a high-density yeast inoculum [51][52][53]. A summary of the raw materials, main process parameters, and ethanol yields in these studies and in other recent reports on SSF modification strategies is presented in Table 4.…”

Section: The Sfss Systemmentioning

confidence: 99%

Cellulosic Ethanol: Improving Cost Efficiency by Coupling Semi-Continuous Fermentation and Simultaneous Saccharification Strategies

et al. 2020

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A novel approach to improve ethanol production from sugarcane bagasse is proposed. Biomass was pretreated with sodium hydroxide, sulfuric, oxalic, and maleic acids (1% w/v) at different temperatures (130–170 °C) and times (10–30 min). The pretreatment with NaOH at 160 °C for 20 min was found to be the most efficient for further enzymatic saccharification. A semi-continuous fermentation system coupled with a simultaneous saccharification and fermentation strategy was used, attaining fermented liquor every 24 h. The amount of enzymes needed for saccharification was optimized, as well as the production time and ethanol concentration. The process occurred with near to complete depletion of glucose, obtaining ethanol concentrations ranging from 8.36 to 10.79% (v/v). The whole system, at bench scale, showed stability over 30 days, and ease of management and control. This strategy may improve cost efficiency in the production of cellulosic ethanol at industrial scale.

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“…Xu et al [5] investigated the influence of starchy substrate addition on cellulosic ethanol production, demonstrating the improvement of the final ethanol concentration from 6.9 to 18.1 g/L. Ye et al [6] obtained a final ethanol concentration of 82.83 g/L by the co-fermentation of sugarcane bagasse and Dioscorea composita hemls. Erdei et al [7] achieved 99% of the theoretical ethanol yield using the mixtures of wheat straw and wheat meal.…”

Section: Introductionmentioning

confidence: 99%

“…Sugarcane is the most important sugar crop in the tropical regions of the world, and it is widely planted in southern China [6]. SCB and molasses are both by-products of the cane sugar production.…”

Section: Introductionmentioning

confidence: 99%

Integrating sugarcane molasses into sequential cellulosic biofuel production based on SSF process of high solid loading

Fan

Zhang

et al. 2018

Biotechnol Biofuels

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BackgroundSugarcane bagasse (SCB) is one of the most promising lignocellulosic biomasses for use in the production of biofuels. However, bioethanol production from pure SCB fermentation is still limited by its high process cost and low fermentation efficiency. Sugarcane molasses, as a carbohydrate-rich biomass, can provide fermentable sugars for ethanol production. Herein, to reduce high processing costs, molasses was integrated into lignocellulosic ethanol production in batch modes to improve the fermentation system and to boost the final ethanol concentration and yield.ResultsThe co-fermentation of pretreated SCB and molasses at ratios of 3:1 (mixture A) and 1:1 (mixture B) were conducted at solid loadings of 12% to 32%, and the fermentation of pretreated SCB alone at the same solid loading was also compared. At a solid loading of 32%, the ethanol concentrations of 64.10 g/L, 74.69 g/L, and 75.64 g/L were obtained from pure SCB, mixture A, and mixture B, respectively. To further boost the ethanol concentration, the fermentation of mixture B (1:1), with higher solid loading from 36 to 48%, was also implemented. The highest ethanol concentration of 94.20 g/L was generated at a high solid loading of 44%, with an ethanol yield of 72.37%. In addition, after evaporation, the wastewater could be converted to biogas by anaerobic digestion. The final methane production of 312.14 mL/g volatile solids (VS) was obtained, and the final chemical oxygen demand removal and VS degradation efficiency was 85.9% and 95.9%, respectively.ConclusionsMolasses could provide a good environment for the growth of yeast and inoculum. Integrating sugarcane molasses into sequential cellulosic biofuel production could improve the utilization of biomass resources.

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Ethanol production from mixtures of sugarcane bagasse and Dioscorea composita extracted residue with high solid loading

Cited by 44 publications

References 41 publications

Microbial Lipid Production from Corn Stover by the Oleaginous Yeast Rhodosporidium toruloides Using the PreSSLP Process

Microbial Lipid Production from Corn Stover by the Oleaginous Yeast Rhodosporidium toruloides Using the PreSSLP Process

Cellulosic Ethanol: Improving Cost Efficiency by Coupling Semi-Continuous Fermentation and Simultaneous Saccharification Strategies

Integrating sugarcane molasses into sequential cellulosic biofuel production based on SSF process of high solid loading

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